Sample liquid extraction device for sample tube

Abstract

The utility model discloses a sample liquid extraction device for a sample tube, which comprises a sample plate and a transverse moving mechanism for conveying the sample plate, a plurality of circular placing grooves are arranged on the sample plate and are linearly arranged in the horizontal direction, one side of the transverse moving mechanism is provided with a lifting seat, and the other side of the transverse moving mechanism is provided with a lifting handle. A horizontal rotating mechanism is arranged on the lifting seat, a connecting shell is arranged on the horizontal rotating mechanism, and a plurality of vertical sampling needles are arranged at the lower end of the connecting shell side by side; according to the scheme, the plurality of sampling needles can simultaneously penetrate through the rubber bodies on the tube covers of the plurality of sample tubes and enter the sample tubes, so that sample liquid in the sample tubes can be extracted through suction equipment under the condition that the covers of the sample tubes are not separated, and the sample liquid is not easily exposed in the air, so that biological infection is avoided; meanwhile, sample liquid in a plurality of sample tubes can be synchronously extracted through a plurality of sampling needles, so that the extraction efficiency of the sample liquid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sample collection, and particularly relates to a sample liquid extraction device for a sample tube. Background Art

[0002] During the process of collecting and extracting sample liquid from a sample tube, the traditional extraction method is as follows: first, unscrew the tube cap of the sample tube, and the tester selects a handheld pipette with different measuring ranges according to the required sample volume for the test to extract the liquid from the sample, so as to realize the extraction and pipetting of the sample liquid; when the number of sample tubes is large, the manual operation has a large labor intensity, is easy to fatigue, and has low efficiency, and it is difficult to ensure the consistency of pipetting accuracy; at the same time, it is difficult for operators with weak technical experience to accurately judge the appropriate liquid suction position when extracting the sample liquid; in addition, since the sample liquid is collected with the sample tube uncapped, if the sample liquid is a high-risk biological sample, when the high-risk biological sample is pipetted and prepared, the sample liquid is easily exposed to the air and causes biological infection. Content of the Utility Model

[0003] Aiming at the above deficiencies of the prior art, the utility model provides a sample liquid extraction device for a sample tube, which solves the problems of large labor intensity, low efficiency and easy infection during manual extraction of sample liquid.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] Provide a sample liquid extraction device for a sample tube, which includes a sample plate and a transverse movement mechanism for transporting the sample plate. A number of circular placement grooves for placing sample tubes are arranged on the sample plate, and the number of circular placement grooves are arranged in a horizontal row. A lifting seat is arranged on one side of the transverse movement mechanism, a horizontal rotation mechanism is arranged on the lifting seat, a connecting housing is arranged on the horizontal rotation mechanism, and a number of vertical sampling needles are arranged side by side at the lower end of the connecting housing. The distance between adjacent two sampling needles is equal to the distance between adjacent two sample tubes on the sample plate.

[0006] Further, the horizontal rotation mechanism includes a vertical spline shaft, the spline shaft is rotatably arranged on the lifting seat, a gear that rotates synchronously with the spline shaft is movably sleeved on the spline shaft, the gear is in transmission connection with a gear motor, and the connecting housing is arranged at the top end of the spline shaft.

[0007] Further, the lifting seat is in sliding fit with a vertical guide rail, one side of the lifting seat is connected with a vertical conveyor belt, and the vertical conveyor belt is in transmission connection with a lifting motor.

[0008] Further, a toothed disc that rotates synchronously is arranged on the gear, a transmissive photoelectric sensor is arranged at the outer edge teeth of the toothed disc, and the transmitting end and the receiving end of the transmissive photoelectric sensor are respectively located above and below the outer edge teeth.

[0009] Further, an elastic clamping piece for clamping a sample tube is arranged on the transverse movement mechanism. A positioning platform is arranged above the elastic clamping piece. A plurality of avoidance holes facilitating the penetration of a sampling needle are arranged on the positioning platform. A position sensor for detecting the sampling needle is arranged on one side of the avoidance hole.

[0010] Further, the sampling needle is connected to a suction device. The sampling needle is made of a metal conductive material and is electrically connected to a capacitance detection module.

[0011] Further, the transverse movement mechanism includes a horizontal conveyor belt drivingly connected to a transverse movement motor. A transverse movement seat for limiting and placing a sample plate is arranged on the horizontal conveyor belt. The transverse movement seat is in sliding fit with a horizontal guide rail.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. In this solution, the lifting motor and the gear motor can drive a plurality of sampling needles to simultaneously penetrate through the rubber bodies on the caps of a plurality of sample tubes and enter the sample tubes. Under the condition that the sample tubes are not uncapped, the sample liquid in the sample tubes can be extracted by a suction device, and then the sample liquid is transferred to an external device for detection. During the entire extraction process of the sample liquid, the sample liquid is not easily exposed to the air, thereby avoiding the occurrence of biological infection. At the same time, a plurality of sampling needles can synchronously extract the sample liquid in a plurality of sample tubes, improving the extraction efficiency of the sample liquid.

[0014] 2. In this solution, the opposed photoelectric sensor can accurately measure the rotation angle of the sampling needle, and the position sensor can detect whether the sampling needle reaches the sampling position. The two cooperate to accurately control the position of the sampling needle, thereby effectively avoiding the situation of needle collision during the extraction of the sample liquid by the sampling needle; through the change of the capacitance value of the capacitance detection module, it can be detected whether the needle tip of the sampling needle touches the sample liquid, thereby realizing the automatic detection of the liquid suction position of the sampling needle. Description of the Drawings

[0015] Figure 1 It is the first structural schematic diagram of the sample liquid extraction device of this solution.

[0016] Figure 2 It is the second structural schematic diagram of the sample liquid extraction device of this solution.

[0017] Among them, 1. sample plate, 2. circular placement groove, 3. lifting seat, 4. connecting shell, 5. sampling needle, 6. spline shaft, 7. gear, 8. gear motor, 9. vertical guide rail, 10. vertical conveyor belt, 11. lifting motor, 12. toothed disc, 13. through-beam photoelectric sensor, 14. elastic clamping piece, 15. positioning platform, 16. avoidance hole, 17. position sensor, 18. transverse movement motor, 19. horizontal conveyor belt, 20. transverse movement seat, 21. horizontal guide rail, 22. sample tube. DETAILED DESCRIPTION

[0018] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0019] like Figure 1 and Figure 2 As shown, the sample liquid extraction device for sample tubes of the present invention comprises a sample plate 1 and a transverse movement mechanism for conveying the sample plate 1, the transverse movement mechanism comprises a horizontal conveyor belt 19 which is transmission-connected to a transverse movement motor 18, a transverse movement seat 20 for limiting the placement of the sample plate 1 is arranged on the horizontal conveyor belt 19, and the transverse movement seat 20 is slidably matched with a horizontal guide rail 21; a plurality of circular placement grooves 2 for placing sample tubes 21 are arranged on the sample plate 1, and the plurality of circular placement grooves 2 are arranged in a line in the horizontal direction.

[0020] A lifting seat 3 is provided on one side of the transverse movement mechanism. The lifting seat 3 is slidably matched with the vertical guide rail 9. One side of the lifting seat 3 is connected to the vertical conveyor belt 10, and the vertical conveyor belt 10 is connected to the lifting motor 11 in transmission connection. A horizontal rotation mechanism is provided on the lifting seat 3, and the horizontal rotation mechanism includes a vertical spline shaft 6. The spline shaft 6 is freely rotatably arranged on the lifting seat 3. A movable sleeve is provided on the spline shaft 6 with a gear 7 that rotates synchronously with the spline shaft 6. The spline shaft 6 and the gear 7 are connected by a key, and the spline shaft 6 can slide axially. The gear 7 serves as a fixed transmission member and is connected in transmission connection with the gear motor 8. A connecting shell 4 is provided on the top of the spline shaft 6, and two vertical sampling needles 5 are arranged side by side at the lower end of the connecting shell 4. The spacing between the two sampling needles 5 is equal to the spacing between two adjacent sample tubes 21 on the sample plate 1.

[0021] The two sampling needles 5 of this solution are respectively connected to the two suction devices, the sampling needles 5 are made of metal conductive material, and the two sampling needles 5 are respectively electrically connected to the two capacitance detection modules, wherein the suction device and the suction device can be integrated in the connecting shell 4.

[0022] On the gear 7 of this solution, a toothed disc 12 that rotates synchronously is provided. At the outer edge teeth of the toothed disc 12, a transmissive photoelectric sensor 13 is provided, and the transmitting end and the receiving end of the transmissive photoelectric sensor 13 are respectively located above and below the outer edge teeth; on the transverse movement mechanism, an elastic clamping piece 14 for clamping the sample tube 21 is provided. Above the elastic clamping piece 14, a positioning platform 15 is provided. On the positioning platform 15, two avoidance holes 16 that facilitate the sampling needle 5 to pass through are provided. On one side of the avoidance hole 16, a position sensor 17 for detecting the sampling needle 5 is provided. The position sensor 17 is preferably a diffuse reflection photoelectric sensor.

[0023] When this solution is working, the lifting motor 11 and the gear motor 8 can drive two sampling needles 5 to simultaneously pass through the rubber bodies on the caps of two sample tubes 21 and enter the sample tubes 21. Without removing the caps of the sample tubes 21, the extraction of the sample liquid in the sample tubes 21 is realized through a suction device, and then the sample liquid is transferred to an external device for detection. During the whole process of extracting the sample liquid, the sample liquid is not easily exposed to the air, thus avoiding the occurrence of biological infection. At the same time, the two sampling needles 5 can synchronously extract the sample liquid in the two sample tubes 21, improving the extraction efficiency of the sample liquid; when the needle tip of the sampling needle 5 touches the sample liquid, the capacitance detection module detects that the capacitance value of the sampling needle 5 changes, thereby judging that the needle tip touches the sample liquid, so as to realize the automatic detection of the liquid suction position of the sampling needle 5; at the same time, when sucking liquid, the liquid suction speed of the sampling needle 5 is matched with the downward movement speed of the sampling needle 5 to avoid the sampling needle 5 sucking air in vain.

[0024] When the toothed disc 12 of this solution rotates, the teeth on its outer edge can intermittently block the optical path between the transmissive photoelectric sensors 13, thereby generating a high and low frequency difference, and the accurate measurement of the rotation angle of the sampling needle 5 is realized by receiving the high and low frequency difference; at the same time, the position sensor 17 can detect whether the sampling needle 5 reaches the sampling position. The two cooperate to realize the accurate control of the position of the sampling needle 5, thus effectively avoiding the situation of the sampling needle 5 hitting the needle during the extraction of the sample liquid.

Claims

1. A sample liquid extraction device for a sample tube, characterized in that: It includes a sample plate and a transverse movement mechanism for conveying the sample plate, wherein the sample plate is provided with a plurality of circular placement grooves for placing sample tubes, and the plurality of circular placement grooves are arranged in a line in the horizontal direction, a lifting seat is provided on one side of the transverse movement mechanism, a horizontal rotation mechanism is provided on the lifting seat, a connecting shell is provided on the horizontal rotation mechanism, a plurality of vertical sampling needles are arranged side by side at the lower end of the connecting shell, and the distance between two adjacent sampling needles is equal to the distance between two adjacent sample tubes on the sample plate.

2. The sample liquid extraction device for a sample tube according to claim 1, characterized in that: The horizontal rotation mechanism includes a vertical spline shaft, which is freely rotatably arranged on a lifting seat, a movable sleeve on the spline shaft is provided with a gear that rotates synchronously with the spline shaft, the gear is transmission-connected to a gear motor, and the connecting housing is arranged at the top end of the spline shaft.

3. The sample liquid extraction device for a sample tube according to claim 1 or 2, characterized in that: The lifting seat is slidably matched with the vertical guide rail, one side of the lifting seat is connected with the vertical conveyor belt, and the vertical conveyor belt is drivingly connected with the lifting motor.

4. The sample liquid extraction device for a sample tube according to claim 2, characterized in that: The gear is provided with a synchronously rotating toothed disc, and a through-beam photoelectric sensor is provided at the outer gear teeth of the toothed disc, and the transmitting end and the receiving end of the through-beam photoelectric sensor are respectively located above and below the outer gear teeth.

5. The sample liquid extraction device for a sample tube according to claim 1, characterized in that: The transverse movement mechanism is provided with an elastic clamping piece for clamping the sample tube, a positioning platform is provided above the elastic clamping piece, a plurality of avoidance holes for the sampling needle to pass through are provided on the positioning platform, and a position sensor for detecting the sampling needle is provided on one side of the avoidance hole.

6. The sample liquid extraction device for a sample tube according to claim 1, characterized in that: The sampling needle is connected to the suction device, the sampling needle is made of a metal conductive material, and the sampling needle is electrically connected to the capacitance detection module.

7. The sample liquid extraction device for a sample tube according to claim 1, characterized in that: The transverse movement mechanism comprises a horizontal conveyor belt which is transmission-connected to the transverse movement motor. The horizontal conveyor belt is provided with a transverse movement seat for limiting the position of the sample plate. The transverse movement seat is slidably matched with the horizontal guide rail.

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